Problem 1QC: What evidence suggests that matter is composed of atoms? Problem 2QC: How can the composition of atom differ? Problem 3QC: How do ions differ from the atoms of elements? Problem 4QC: How can we describe the mass of the atoms of the atoms of an element? Problem 5QC: How does the periodic table relate to the structure and behaviour of atoms? Problem 1PP: For the atom represented in the following diagram, (a)  Determine the number of protons and... Problem 2PP: A rare isotope of carbon has a mass number of 14. How many protons, electrons, and neutrons are in... Problem 3PP: Write two representations for the following isotope. Problem 4PP: Determine the number of neutrons in each of the following isotopes. aI53131b37Clccarbon-13 Problem 5PP: How many protons and electrons compose the following ions? Identify each as a cation or anion.... Problem 6PP: Write the isotope symbols for ions that have the following numbers of protons, neutrons, and... Problem 7PP: The copper mined from Earth’s crust consists of 63Cu (62.93 amu) and 65Cu (64.93 amu). Which... Problem 8PP: The element lithium is composed of two isotopes, lithium-6 and lithium-7. The mass and percent... Problem 9PP: Identify the element that is described. (a) the element that is in group VA (15) and in period 2,... Problem 10PP Problem 1QP: Match the key terms with the descriptions provided. (a) an electrically neutral subatomic particle... Problem 2QP: Match the key terms with the descriptions provided. (a) a member of one of the B groups of elements... Problem 3QP Problem 4QP: What modern technique allows us to “see� the surface of atoms? Problem 5QP: How does Dalton‘s atomic theory describe atoms of different elements? Problem 6QP: How does Dalton’s atomic the theory the law of conservation of mass? Problem 7QP: How does Dalton‘s atomic theory explain the law of definite proportions? Problem 8QP: How does Dalton's atomic theory explain the formation of compounds from elements? Problem 9QP: Does the following diagram represent a chemical reaction that obeys the law of conservation of mass?... Problem 10QP: Does the following diagram represent a chemical reaction that obeys the law of conservation of mass?... Problem 11QP: Which experiment showed that all atoms contain negatively charged particles with masses far less... Problem 12QP: What information about the structure of the atom did Rutherford's gold foil experiment provide? Problem 13QP: Which subatomic particles are negatively charged? Problem 14QP: Which subatomic particles are positively charged? Problem 15QP: Helium is used in balloons and blimps because of its lifting power. Draw a nuclear model of a helium... Problem 16QP: Hydrogcn-3 (tritium) is used as a tracer in chemical, biological, and medical research. Draw a... Problem 17QP: Which subatomic particle has approximately the same mass as a proton? Problem 18QP: Which of the following best describes about how many times greater in mass a proton is than an... Problem 19QP: Explain why the mass of a carbon atom is about twice the mass of the protons in a carbon atom. What... Problem 20QP: Which subatomic particle was discovered last? Why was it difficult to detect? Problem 21QP Problem 22QP: How many protons are in each atom of each of the following elements? aheliumbargonclead Problem 23QP: The number of which subatomic particle determines the identity of an element? Problem 24QP: How do isotopes of an element differ? Problem 25QP: What information do you need to determine the atomic number of an atom? Problem 26QP: What information do you need to determine the mass number of an atom? Problem 27QP: Which of the following are always the same for atoms of the same element? (a) mass number (b) atomic... Problem 28QP: Which of the following are different for isotopes of an element? (a) mass number (b) atomic number... Problem 29QP: Given the composition of the nuclei, what are the atomic number, neutron number, and mass number of... Problem 30QP: Identify the element from the atom shown. What are the atomic number, neutron number, and mass... Problem 31QP: What are the atomic number, neutron number, and mass number of the following isotopes?... Problem 32QP: Identify the element from the atom shown. What are the atomic number, neutron number, and mass... Problem 33QP Problem 34QP: How many protons, neutrons, and electrons are in each of the following? (a) a hydrogen atom with a... Problem 35QP: What is the isotope symbol for atoms that contain the following numbers of subatomic particles? (a)... Problem 36QP: What is the isotope symbol for atoms that contain the following numbers of subatomic particles? (a)... Problem 37QP: How many protons and neutrons are in an atom represented by the following? a2656Feb39kccopper-65 Problem 38QP: How many protons and neutrons are in an atom represented by the following? a511BbZ68nciodine127 Problem 39QP: A study of blood flow in heart muscle uses nitrogen-l3 incorporated into a chemical agent. How many... Problem 40QP: Phosphorus-32 can be used to treat eye tumors. How many protons and neutrons are found in the P-32... Problem 41QP: Complete the following table for the designated atoms. Problem 42QP: Complete the following table for the designated atoms. Problem 43QP: How do an atom and an ion of the same element differ? Problem 44QP: What changes when an ion forms from an atom, or when an atom forms from an ion? Problem 45QP Problem 46QP: What forms when an ion with a 1+ charge undergoes each of the following changes? (a) It gains one... Problem 47QP Problem 48QP: Write the symbol for the ion that is formed after each of the following changes. Identify each ion... Problem 49QP: How many protons and electrons are found in each of the following? aZn2+bFCH+ Problem 50QP: How many protons and electrons are found in each of the following? aP3bA13+cO2 Problem 51QP Problem 52QP Problem 53QP: What element has 18 electrons when it forms a cation with a 1+ Charge? Problem 54QP: What element has 18 electrons when it forms an anion with a 2 charge? Problem 55QP: What element has 27 electrons when it forms a cation with a 2+ charge? Problem 56QP: What element has 46 electrons when it forms a cation with a 1+ charge? Problem 57QP: How do 7Li+6Li each differ from a neutral lithium-7 atom? Which differs from lithium-7 by the... Problem 58QP: How do B3579r and B3581r Br differ in their numbers of subatomic particles? Which should have the... Problem 59QP: Potassium citrate is a compound found in some sparkling beverages. The potassium in this compound is... Problem 60QP: Calcium citrate is a compound found in some calcium supplement medications. The calcium in this... Problem 61QP: What is the basis for the atomic mass unit (amu) scale? Problem 62QP: What is the mass of a carbon-12 atom on the amu scale? ls this value exact or approximate? Problem 63QP: What is the approximate mass, in atomic mass units, of the following isotopes? aH12  bU92238 Problem 64QP: Estimate the combined mass (in atomic mass units) of 10 cobalt-59 atoms. Problem 65QP: Approximately how much greater in mass is a D2 molecule than an H2 molecule? Problem 66QP: Approximately how much greater in mass is a D2O molecule than an H2O molecule? (Assume the oxygen... Problem 67QP: Approximately how much greater in mass is a krypton-80 atom than an argon-40 atom? Problem 68QP: Approximately how much greater in mass is a magnesium-24 atom than a carbon-12 atom? Problem 69QP: Why do we use the amu mass scale instead of the gram mass scale when discussing masses of atoms? Problem 70QP: What is the relationship between grams and atomic mass units? How many atomic mass units are in 1g ? Problem 71QP: What is the difference between the mass of an atom and the mass number of an atom? Problem 72QP: Which isotope has exactly the same mass (in atomic mass units) as its mass number? Problem 73QP: How is the mass of an individual atom determined? How do you determine the mass number of an atom? Problem 74QP: Which of the following is most likely the mass of a nickel-62 atom: 62,0000000 amu, 62,495654 amu,... Problem 75QP: Naturally occurring calcium is composed of two isotopes: calcium-40 and calcium-44. Which isotope is... Problem 76QP: Naturally occurring silicon is composed mostly of one isotope. Write its symbol. Problem 77QP: An unknown element (X) discovered on a planet in another galaxy was found to exist as two isotopes.... Problem 78QP: Suppose that the isotope abundance of magnesium on another planet has been determined to be... Problem 79QP: The mass spectrum of nickel is shown. (a) What is the most abundant isotope of nickel? (b) What is... Problem 80QP: The mass spectrum of magnesium is shown. (a) What is the most abundant isotope of magnesium? (b)... Problem 81QP: What is the mass in amu of 1000 boron atoms? Problem 82QP: What is the mass in amu of 1000 mercury atoms? Problem 83QP: Which contains more atoms, 2500 amu of boron atoms or 2500 amu of mercury atoms? Problem 84QP: A sample of pure silver and a simple of pure gold have the same mass. Which contains the greatest... Problem 85QP: Identify which of the elements Br, K, Mg, Al, Mn, and Ar can be classified in each of the following... Problem 86QP: Identify which of the elements He, Zn, Pb, L Ca, and Na can be classified in each of the following... Problem 87QP Problem 88QP: Name the element that is an alkaline earth metal in period 5. Problem 89QP: What element is in group IVB (4) and in period 4? Problem 90QP: What element is in group IVA (14) and in period 2? Problem 91QP: Identify each of the following elements as a metal, nonmetal, or metalloid. (a) calcium (b) carbon... Problem 92QP: Identify each of the following elements as a metal, nonmetal, or metalloid. (a) phosphorus (b)... Problem 93QP: Identify the following elements as a main-group element, transition metal, lanthanide, or actinide.... Problem 94QP: Identify the following elements as a main-group element, transition metal, lanthanide, or actinide.... Problem 95QP Problem 96QP Problem 97QP Problem 98QP Problem 99QP Problem 100QP: The noble gases are sometimes called “inert gases." Why? Why do they not form ions? Problem 101QP: The ions of many of the main-group elements have the same number of as the noble gas nearest to... Problem 102QP Problem 103QP: Identify the groups of the periodic table in which all the elements form ions of the charge... Problem 104QP: For each group listed. identify the charge on the ions that they form. (a) group VIA (16) (b)... Problem 105QP Problem 106QP Problem 107QP Problem 108QP: Chlorine gas reacts with potassium to form a compound with properties similar to table salt. Which... Problem 109QP: When iron rusts. a compound forms with the formula Fe2O3 . When iron nails rust, should their mass... Problem 110QP: Is the law of conservation of mass obeyed in the reaction shown? Explain. Problem 111QP: A 100-g sample of zinc sul�de contains 67.1 g zinc and 32.9 g sulfur. if a 1.34-g sample of zinc... Problem 112QP: A 100-g sample of HgO contains 92.6 g mercury and 7.4 g oxygen. What mass of mercury atoms and what... Problem 113QP: What properties of electrons contributed to why they were the �rst subatomic particles to be... Problem 114QP: What experimental evidence led to each of the following advances in our understanding of atomic... Problem 115QP: Which isotope has a mass number of 60 and an atomic number of 28? Problem 116QP: Why is it impossible for an element to have a mass number less than its atomic number? Problem 117QP: How many protons and neutrons are in a potassium-39 atom? Problem 118QP: What number of each type of subatomic particle is found in most H+ ions? Problem 119QP: Explain why the relative atomic mass of cobalt is greater than that of nickel. although the atomic... Problem 120QP: Which element has an isotope that has a mass approximately three times greater than its most... Problem 121QP: Some tables list relative atomic mass to as many signi�cant �gures as can be reported... Problem 122QP: How many atoms are in each of the following samples of carbon-12? (a) 120 amu (b) 12,000 amu (c)... Problem 123QP: Naturally occurring iodine is composed of only one isotope. What is its mass number? Problem 124QP Problem 125QP: A sample of pure carbon and a sample of pure iodine have the same mass. Which has the greatest... Problem 126QP: Two equal-volume balloons contain the same number of atoms. One contains helium and one contains... Problem 127QP: Naturally occurring boron comprises two isotopes, boron-10 and boron-l1. The atomic mass of boron-10... Problem 128QP Problem 129QP Problem 130QP: Nitrogen and oxygen are the main components of the air we breathe. Write formulas to represent these... Problem 131QP Problem 132QP: Which element is the only nonmetal in group IVA (14)? Problem 133QP Problem 134QP Problem 135QP: Complete the following table for the designated subatomic particles. Problem 136QP: Atoms of the element shown in this photo contain 28 protons. What is the element? Problem 137QP: Positron emission tomography (PET) is used in medicine to produce an image of functions inside the... Problem 138QP: When silver tarnishes, a chemical reaction occurs in which a compound of silver and sulfur forms on... Problem 139QP: The iron found in the human body is in the form of fe2+ or Fe3+ ions. How do neutral atoms and the... Problem 140QP: Which has the greater density, an ice cube containing the hydrogen-l isotope or an ice cube... Problem 141QP Problem 142QP: After he conducted cathode ray tube experiments proving the existence of negatively charged... Problem 143QP: Analysis of carbon-14 content is used to date fossils up to about 60,000 years old. There are two... Problem 144QP: A naturally occurring isotope of potassium has a mass number of 40. One of argon’s naturally... Problem 145QP Problem 146QP: A monatomic ion with a 4+ charge has the same number of electrons as an argon atom. What is the... Problem 147QP: Which of the following has the greatest number of electrons? A.Ca2+B.K+C.ClD.S2 E. These all have... Problem 148QP Problem 149QP: Atoms that are isotopes of the same element differ in A. number of neutrons B. number of protons C.... Problem 150QP: Which of the following statements about atoms and subatomic particles is true? A. The nucleus of an... Problem 151QP: Elements in which group always form monatomic ions with a negative 1 1 charge? A. alkali metals B.... Problem 152QP: Identify the number of protons and neutrons in an atom of the isotope 64Zn. A. 64 protons, 34... Problem 153QP: Naturally occurring gallium (Ga) is made of two isotopes: gallium-69 and gallium-71. Which of the... Problem 154QP: Which of the following elements is classi�ed as a nonmetal in period 3? A. potassium B. phosphorus... format_list_bulleted